Best advice is to take a couple of CD's you know well and listen to your selected headphones. Take into consideration that your new cans not only have to have a flat response but they also should be comfortable. After all, you might have to wear them for hours on end. Let your ears be the judges.
As for the regular Grados: I have a pair of Grado RS2i and I absolutely love them. The R stands for reverence.... I use them for mixing as well as just listening to music.
Headphones that are popular in studios are:
beyerdynamic dt770 pro
AKG K240
Sony MDR 7509 / MDR V900
Sennheiser HD600
I tried them all and I chose the Grado RS2i. With these cans I wast best able to analise the music, the placement of all the instruments on the virtual stage, the sound of each instruments, even stringnoise and pick-noises I never heard before. The big downside of-course is the price of the cans
